Means for securing paper rolls to roll shafts



Feb. 21, 1950 DE AR NE. 2,498,486

MEANS FOR SECURING PAPER ROLLS T0 ROLL SHAFTS Filed March 28, 1946 mum in H 16 IN VENTOR Mic/me] 17 Ma 11115 BY 4. 4. gmmum ATTORNEYS Patented Feb. 21, 1950 MEANS FOR SECURING PAPER ROLLS TO ROLL SHAFTS Michael De Marinis, Bronx, N. Y.

Application March 28, 1946, Serial No. 657,774

11 Claims.

This invention relates to means for securing paper rolls to roll shafts, and, more particularly, it relates to a chuck or dog for rigidly fixing a roll onto such roll shafts as customarily used in the printing and lithographic arts for supporting heavy paper rolls.

It is an object of this invention to provide a simply constructed and easily attachable chuck for securing a paper roll to a shaft so that said roll and shaft will form a unitary structure and rotate simultaneously, whereby the paper will be drawn evenly under tension from the roll, presenting a smooth surface for plane or flat printing of the paper pulled from the roll.

Another object of the invention is to provide a relatively economical, securing mechanism for adjustably fixing a paper roll to a shaft to retain said roll in rigidly fixed relation to the shaft.

A more specific object of the invention is to provide an easily mountable and operable chuck having a tubular split arbor with a plurality of peripheral lugs fixed to the other end of the arbor adapted to be readily adjusted and to 6X:- pand radially to press. against the roll core, and means for securing said arbor to a shaft extending through the core of the roll so that said chuck and shaft will be fixed as a unit to rotate as such, when the paper roll is being unwound under tension during printing or lithographic operation.

Other objects and features of this invention will become apparent from the following description taken in connection with the accompanying drawings in which Fig. l is a detailed plan expanded view, partly in section, showing a preferred embodiment oi" the invention, unassembled;

'Fig. 2 is an end view, partly in section, of Fig. 1; and

Fig. 3 is a plan view partly in section and partly iragmental, of the embodiment as used in connection with a paper roll.

Referring now to the drawings, in which like reference characters denote like parts throughout, there is' provided an arbor ll) of tubular structure having one end H provided with a plurality of longitudinal slits l2 disposed at intervals in the periphery of the arbor. Each slit l2 has a circular opening l3 disposed away from end H so as to permit the resultant sections at this end ll. of the arbor to be -'yieldably compressed' when used, as will be further described.= It is to. be noted, also, that said end H of' arbor I is smooth externally and gradually til tapers to the right of its length as shown in Fig. 1. Furthermore, the arbor is provided with, a threaded portion l3 set in from the smooth end and extending along the major length of thearbor so as to permit the screwing thereon of a collar 14 which can be rotated towards the left end of the arbor, as shown in Fig. l. collar I4 is provided with a plurality of holes 15 adapted to accommodate the lug portion ofa I spanner wrench, not shown, when the collar is to be used and tightened.

At the other end of the arbor Ill there is provided an integral section or extension is of said arbor of frusto-conical outline, as shown, containing in its periphery a plurality of spaced radially extending angle irons 11, I3, IS and 20 forming grooves 2|, 22, 23 and 24, respectively.

In the embodiment shown, there are provided" four grooves equispaced around the periphery of the extension l6. Said angle irons are adapted to accommodate pivotal members or fingers 25, 26, 21 and 28 respectively which are retained in pivotal position in said grooves by means of bolt or rivet members 29, 30, 3i and 32, respectively, It is to be noted that each of said fingers is of the same outline, having an outwardly tapering portion extending from the rivet or bolt members toward the free end of the recess, while the short ends 33, 34, 35 and 36, not shown, of the respective fingers extend from said grooves towards collar member M with which said short ends will make contact when the collar is rotated in the direction of said short ends. Disposed intermediate each of the short ends 33, 34, 35 and 36 near thev collar and the rivet members 29, 30, 3| and 32, respectively, are spring members 31, which are adapted normally to force the short ends of said fingers upwardly and away from said collar, using said bolt members as pivots for each of'said fingers, as shown in Fig. 1. In this manner, the long end of each of said fingers is normally housed in each of the respective recesses or grooves. It will be noted that the spring members are fixed in a suitable manner to the fingers and in the recesses, such as shown in Figs. 1 and 2.

It is to: be noted at this point that when collar 14 is rotated on the threaded portion of arbor l0, so as to contact the protruding short ends 33, 34, 35 and 36 of the fingers 25, 26, 21 and 28, the long ends of the fingers are simultaneously forced upwardly andv outwardly of each of the recesses, thereby causing a radial expansion of thev fingers around each of the respective bolts asa pivot. Thesefingers, in. expanding radially,

when inserted into the core 4| of a paper roll 42, as shown in Fig. 3, form contact with said core and remain rigidly fixed against the end of said core as an abutment. By adjusting collar I4, the depth to which the fingers can be inserted into the core of roll 42 can be adjusted. Furthermore, these fingers are actuated simultaneously by means of member l4 so that they are adapted to fit evenly into any size core usually encountered in paper rolls as used in the printing and like industries, where rolls, of paper are used in large quantities.

In order to fix the arbor Ill-to a shaft 43 which can be passed through the arbor and the core of roll 42, there is provided a frusto-conical locking unit or cap 44 which is adapted to be screwed onto said arbor Ill. The cap 44 has a radially extending flange portion 45 containing a plurality of equispaced holes 46 in its periphery 4'! foraccommodating the lug of a spanner wrench, not shown, so that said cap may be screwed onto the arbor Ill. The interior of said locking unit has a tapering opening 48, while the end of said opening at flange 45 has an internally threaded portion 49 adapted to engage the threaded portion of arbor l0. In doing so, the cap 44 compresses the split portion of said arbor against the shaft 43 so as to form a tight fit therewith, as shown in Fig.3. It is to be noted that the remaining portion of said cap 44 is tapered both internally and externally so as to distribute the force on the split sections of said arbor ID without deforming said arbor. Furthermore, the smooth interior of cap 44 prevents stripping thread E3 on the arbor l0.

In Fig. 3 of the drawing, I have shown how my invention is preferably used in combination with a paper roll. The supports for the roll and shaft 43 are, however, not shown in the drawing since they do not form part of the invention herein described. It will be noted that a pair of chucks is used on a shaft 43, as shown in Fig. 3, passing through the arbor ID of each chuck. The frusto-conical portion of the preferred embodiment, as shown, fits snugly into the core and the fingers of the device are radially expanded around their pivots so that they contact the core as an abutment and press against it. The arbor is firmly fixed onto shaft 43 by cap 44; With this connection, the roll, device and shaft 43 are moved as a unit when paper is being unrolled. From the foregoing description, taken in connection with the accompanying drawings, it will be noted that I have invented a device which is adapted to fit into cores of any'size of paper rolls and also to be adjusted onto shafts of any size which extend through the cores of said rolls.

Furthermore, the device, as disclosed, is easy, simple and economical .to manufacture and use. There is no waste or loss or deformity of such device, or its parts, when used as compared with chucks heretofore used which are usually of one piece and have to be hammered into the cores when mounted on a shaft; or when such chucks have to be removed, a sledge hammer or the like is required. It is to be noted, also, that according to my invention, the radial'spread of the portion of the device contacting the core of the roll is easily regulated and is preferably adapted for heavy duty paper rolls. This device, according to my invention, is adjustable to any degree of rigidity desired between the core and the shaft passing through said core thereby producingra' composite unit'which moves simultaneously with" the paper roll. as it is beingunwound. This device also permits the paper roll to be pulled evenly without any slippage of the roll on its shaft thereby avoiding the tearing and breaking of the paper as it is being unrolled or unwound because of the uneven tension on the paper.

While a preferred form of the invention has been described herein, it is to be understood that changes in the use, form, structure or arrangement of parts may be made without departing from the spirit and scope of the invention, as

claimed in the appended claims.

I claim:

1. A chuck for a paper roll, comprising an arbor mountable on a shaft, having a frusto-conical section extending from the arbor adapted to fit into the core of the roll, and provided with a plurality of recesses, radially adjustable means pivotally mounted in each recess for firmly contacting the core of said roll, and removable means for engaging the arbor to fix the same around the shaft and form a tight fit therewith so as to form a unitary structure.

2. A chuck for a paper roll comprising an arbor having a partly longitudinally split threaded portion and mountable on a shaft adapted to be passed through the roll and retain the same, an integral frusto-conical section extending from the arbor said section having a plurality of axially disposed pivotally adjustable fingers, one of whose ends is adapted to extend radially from the section for engaging the core of said roll, and means for engaging the split portion of the arbor to fix the same around the shaft and form a tight fit therewith.

3. A chuck for a paper roll, comprising a tubular member adapted to fit around a shaft passed through said roll, a frusto-conical unit provided with a plurality of fingers for radially and expandably contacting the core of the roll and remaining fixed therewith, means for the member adapted to press against one end of said fingers, and means mounted on the tubular member adapted to adjustably compress said member against said shaft to rigidly fix themember to the shaft as a unitary structure.

4. A chuck for a paper roll, comprising a partly threaded tubular member being split in its periphery and adapted to fit around a shaft passed through said roll, recessed means extending from the arbor provided with a plurality of pivotally mounted fingers for adjustably contacting the core of the roll and remaining fixed therewith, each of said fingers being pivoted short of one of its ends to the recessed means, rotatable means for the tubular member adapted to press against the short ends of the fingers and thereby raise the longer ends of the fingers against the core of said roll, and means mounted on the tubular member adapted to adjustably compress the split portion of said member against said shaft to rigidly fix the member to the shaft as a unitary structure.

5. A chuck for a paper roll comprising a tubular threaded member adapted to fit around a shaft passed through said roll, a 'frusto-conical unit- 'member. for adjustably compressing said tubular.

member against said shaft to rigidly fix the mem her to the shaft as a unitary structure.

6. The combination with a paper roll having a core extending axially therethrough, of a chuck comprising a tubular, partly split, partly threaded member partly insertable into the core, having radially extensible fingers adapted to be simultaneously and evenly actuated to press against the core, said fingers forming with said tubular member a tapering section permitting easy insertion thereof into the core of said roll, and a threaded member for said split member adapted to be screwed onto said member to press same against a shaft insertable through the member and extending through the roll so as to fix the member to the shaft.

'7. The combination with a paper roll having a core extending axially therethrough, of a chuck comprising a tubular member insertable into the core, having cooper-able, radially extensible pivoted means for pressing against the core, to fix said roll, rotary means on said member for simultaneously actuating the pivoted means whereby one end is raised from the member to press against the core of the roll, and a collar of frusto-conical outline having a threaded portion for said member adapted to compress said member against the shaft insertable into the member and extending through the roll whereby a unitary resultant structure is formed.

8. A chuck for a paper roll, comprising a tubular partly threaded member adapted to fit around a shaft passed through said roll, a unit integral with the member provided with a plurality of pivoted fingers for expandably fitting against the core of the roll and remain fixed therewith, means mounted on the threaded portion of the member adapted to press against one end of said fingers to outwardly extend the other end of the fingers in unison, and operable means mounted on the tubular member adapted to adjust'ably compress said member against said shaft to rigidly fix the member to the shaft as a unitary structure.

9. A chuck for paper rolls and the like, comprising an arbor having a, longitudinally slitted threaded portion at one end and a plurality of pivotally mounted equispaced members on the arbor forming a tapering section with the arbor, means mountable on the arbor adapted to press against one end of the members and outwardly force the other end whereby each of said ends of the members radiates simultaneously from the arbor and presses against the core of said rolls when said arbor is inserted into said core, and rotatable actuatable means engaging the slitted portion of the arbor to fix the arbor to a shaft passed through the core of the roll when used.

10. A chuck for relatively fixing a paper roll and the like,. comprising an arbor mountable on a shaft inserted through the core of the roll, said arbor having a partly longitudinally slitted and threaded section, tapering recessed means disposed on the periphery of the arbor, pivoted means disposed in the recessed means, annular rotatable means on said threaded portion adapted to press against one end of and actuate the pivoted means simultaneously whereby a portion thereof extends outwardly of the arbor and contacts the core of the roll to fix the arbor relatively thereto, and rotatable means on the threaded slit portion of the arbor for contracting and clamping the same to the shaft inserted through the core of the roll.

11. The combination with a paper roll, having a core extending axially therethrough, of a chuck comprising a tubular, longitudinally slitted, partly threaded member insertable into the core and having spaced, simultaneously movable extensible fingers provided with tapering portions adapted to move outwardly of said member for pressing against the core and rigidly fix the roll to said chuck, rotary means on the tubular member adapted to actuate said extensible fingers to press against the core of the roll, and threaded means for said member adapted to compress said member against a shaft insertable through the core of the roll and extending through the roll whereby a unitary rigid structure is formed with the paper roll.

MICHAEL DE MARINIS.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name I Date 1,016,738 Curry Feb. 6, 1912 1,678,710 Selvig July 31, 1928 1,682,309 Schoenfeld 1 Aug. 28, 1928 1,964,585 Larson June 26, 1934 

